Abstract: Aimed at solving high cost， poor safety and extreme difficulty caused by conventional mined-out area treatment by waste rock filling， innovative mined-out area treatment method was studied by inducing and controlling caving as well as surface collapse pit filling， used in Paishanlou gold mine. The innovative methods including using of RG underground television monitoring and evaluation on mined-out area caving process， drilling from the surface protecting the open pit tailings reservoir， blasting ore pillar and inducing the emit through earth′s surface， recovering landform by filling collapse pit from the surface and land forming by alien earth and recovery surface function. The application of this innovative method in Paishanlou gold mine enables safe and efficient filling treatment of large-scale active mined-out area， and achieve good economical and technical results. Both theoretical analysis and practice shows that， for open-pit slope adjacent to the tailings reservoir of inclined ore body mined-out area， using controlled induced caving and surface filling method will reduce the difficulty of mined-out area waste rock filling treatment， and ensured safe and efficient treatment of large-scale mined-out area.

Key words: mined-out area treatment, RG monitoring, caving boundary control, induce caving, filling from surface